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How to read and use the Commodity Channel Index trading indicator

By Zoran Temelkov

Commodity channel index indicator can be used by traders to detect overbought or oversold market conditions.

What is the Commodity Channel Index?

The Commodity Channel Index CCI is a technical analysis indicator developed by the technical analyst Donald Lambert in 1980. It considers the current mean price level in relation to the average mean price for a specific period. The CCI indicator is a way for traders to measure and identify potential overbought and oversold levels for a given market. Commodity channel index indicator is additionally used by traders to evaluate the trend strength and trend direction and to identify potential buy or sell opportunities. The indicator was developed with the commodities market in mind but despite its name, it is also applicable for other assets.

The Commodity channel index values will be high when the prices are way above the average level, this is a signal for strength. On the other hand, CCI will be low when the prices are far below the average level, which will indicate weakness.

The Commodity channel index calculation takes into account a couple of elements and for a 20 period CCI it is performed as follows:

Typical price = (high + low + close) / 3

CCI = (Typical Price - 20 Period SMA of TP) / (0.015 x Mean Deviation)

The value of 0.015 represents a constant which is defined by the creator of the indicator and the inclusion of this constant means that the majority (around 70 to 80 per cent) of the CCI values will go between the 100 to -100 range.

The mean deviation can be calculated by subtracting the 20-period SMA of the typical price from the typical price and afterwards use the absolute values for the obtained results. Finally, you should add the absolute values and divide the result with the number of periods (20) to get the mean deviation.

How to read the Commodity channel index indicator

When plotting the commodity channel index, you can find it below the price chart as a line oscillating within the box. It should be noted that the indicator is an unbounded oscillator. However, the range from 100 to – 100 is given by default while some trading platforms have the option for the trader to change the range. The default setup for the CCI indicator is 20 periods you can modify the number of periods in accordance with your preferences. Keep in mind that shorter period CCI will be more volatile and higher portion will be above or below the 100 and -100 values. Of course, longer period CCI will mean that a smaller percentage will be outside the 100 do -100 range.

Traders read the CCI values above 100 as the possibility that an uptrend will emerge, while a reading below -100 can be an alert for the beginning of a downtrend. The following graph displays the way the Commodity Channel Index will look on a chart.

The CCI indicator is a line oscillating between positive and negative values and because of the constant included in it the calculations, CCI will mostly move between the 100 to -100 interval. Accordingly, traders consider the values above 100 to be in the overbought area while values below -100 are read as oversold alerts.

How to use CCI indicator?

Traders can use the basic commodity channel index strategy to identify trading opportunities based on overbought or oversold levels during a range-bound market. The idea behind the commodity channel index strategy is that during overbought market conditions, the expectations are that prices will start decreasing and when the market is in oversold state price increase is anticipated. Hence, traders can take a short position or long position when the CCI moves above 100 or below -100, or they could enter an opposite position from the trend direction during CCI extremes such as +-200 or more. Of course, the overbought and oversold values and interpretation is subjective and also it is different for different types of instruments. However, traders use the buy and sell signals generated through the oversold and overbought alerts.

Detecting either market condition does not mean that there will be price reversal and that you should immediately open the associated position. The reason is that in times of strong trends, the overbought or oversold conditions can persist for an undefined amount of time, such as days, weeks, etc. Look at the graph below, representing the daily price movement for NZD/USD.

You can see that at the red areas the CCI values are below -100 indicating an oversold market condition which would mean that the trend will reverse, but the price continued its fall. Eventually, the trend does reverses and start moving upwards, but trading based on the CCI oversold signals could have been misleading because of the occurrence of whipsaw.

To filter out false signals, some traders are looking for potential bullish and bearish divergences between the price action and the CCI movement. Traders may setup a commodity channel index trading strategy using the divergence signals because they point toward potential trend reversal as the momentum is not in line with the price movement. Hence, bullish divergence is evident when the price makes a lower low while CCI forms a higher low. A bearish divergence is formed when the price makes a higher high, but the CCI makes a lower high. A word of caution here would also be that traders should confirm their signals using other indicators, especially when the price moves in a strong trend because the signals can also be misleading.

Do not forget that the CCI can be a practical indicator which can provide valid trading signals as long as it is used correctly. Therefore, you should adapt the CCI setting, such as the number of periods and the trading strategy to eliminate potential losses, which may arise from false signals.

Advantages of Commodity channel index

  • CCI can provide an insight into the price momentum;
  • Can come in handy to confirm the formation of a new trend or trend reversals;
  • It provides traders with potential buy and sell signals.

Weaknesses of Commodity channel index

  • Because it is an unbound oscillator indicator the overbought and oversold levels are subjective;
  • Traders should not enter positions based on signals solely provided by the CCI, which means that you should not rely solely on CCI indicator;
  • Since it measures the price relative to the average mean price it cannot account for relevant news which could affect the price;
  • It is difficult to estimate the stop-loss points using the CCI indicator.

FURTHER READING: How to read trading charts

FURTHER READING: How to read and use the Fibonacci retracement indicator

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